1

Glycinamide ribonucleotide (GAR) synthetase

2

GAR transformylase

3

Formylglycinamidine synthase

4

Aminoimidazole ribonucleotide synthetase

5

Carboxyaminoimidazole ribonucleotide synthetase

6

Succinylaminoimidazole carboxamide ribonucleotide synthetase

7

Adenylosuccinate lyase

8

Aminoimidazole carboxamide ribonucleotide transformylase

9

Inosine monophosphate cyclohydrolyase